Leather-staking machine



(No Model.) 2 Sheet;sSheet 1.

G. WfBAKER.

LEATHER STAKING MACHINE. No. 394,750. Patented Dec. 18, 11888.

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LEATHER sTAKING MACHINE.

Patgnigd Deg 18, 1888-.

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N. PETERS, Pholb-Lflhngnphcr, Wnhingtan, n cy UNITED STATES PATENT OEErcE.

GEORGE W. BAKER, OF VILMINGTON, DELAYVARE.

LEATHER-STAKING MACHIN E.

SPECIFICATION forming part of Letters Patent No. 394,750, dated December 18, 1888.

Application filed September 27, 1888- Serial No. 286,619. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. BAKER, a citizen of the United States, and a resident of Wilmington, in the county of New Castle and State of Delaware, have invented certain new and useful Improvements in Leather Staking and Softening Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a partof this specification.

Figure 1 of the drawings is a representation of a side view of the machine. Fig. 2 is a plan view of the same. Fig. 3 is a detail of the pedal. Fig. 4 is an enlarged view of the rollers. Fig. 5 is a transverse section showing the bridge.

This invention has relation to machines for staking and softening leather; and it consists in the construction and novel combination of devices, as hereinafter set forth.

The invention relates to certain improvements upon a leather-staking machine for which Letters Patent No. 372,507 were granted to me on the 1st day of November, 1887 and the object of the improvements is not only to facilitate staking and softening large and heavy skins, but also to perfect the staking and softening operation. i

In the accompanying drawings, the letter A designates the main frame of the machine, having guides a at its ends for the table-frame B, which is capable of vertical reciprocation. The frame 1 is formed with a longitudinal bar, 0, supported by sliding uprights Z), engaging the guides (L, and also carrying the upright arms 0, which slide-in ways a of the longitudinal bar D of the main frame. The tablewings E E are attached to supports of the bar 0 and extend longitudinally, a longitudinal slot or guideway, 1), between said wings serving to receive the long slide F, which has its upper surface flush with the surface of the table, as shown, so that it forms a part of the working-surface on which the skin is placed. The table is in this manner made large enough to accommodate large and heavy skins.

G is a holding-bridge, which extends across the slot 1) between the wings of the table, at about its middle portion, and allows the slide F to reciprocate freely below said bridge, which is of little height, and is formed with beveled ends and rounded edges, so that the skins can be moved over it with facility. The slide F is made long enough to fill the slot on both sides of the bridge, so that the skin cannot get into said slot to be caught thereby, or to interfere in any manner with havin a wristin ada )ted to en a e a b 9. 7 b b notch, 91, in the reciprocating pitman g, which is operated by a cam, h, on the main shaft K of the drive-wheel V. A spring, 7L, attached to the pitman, serves to hold the jaw down to its work with elastic force, the cam acting to raise the jaw from the skin to permit it to be moved. A second spring, g, connects the wrist-pin F to the main frame, and is designed to throw it out of the notch a when the pitman is raised. At the same time the rockshaft, being relieved from its connection with the pitman and its spring, is acted upon by this secondary spring, this stop-motion being designed to raise the holding-slide H and to hold the same in raised position until it is desired to put the jaw in operation again. This is effected by a slight pressure on the jaw, which moves thecrank-arm e a little back, so that it engages the notch of the pitman.

The main wheel \V is provided with a pitman, J, which is connected to the carrier- L, to which the staking-tool S is attached, and as the wheel \V is turned the carrier L reciprocates and communicates a like reciprocating motion to the long slide F, which is connected thereto by the arm K. The staking-tool carrier travels on the guide N, which is connected to the vertically-reciprocating frame Z, which is moved by the action of the twin rock-shafts C and the front and rear cams 13 13, said rook-shafts being connected to each other and to a crank-arm o't the'main drivingshaft.

The long slide F is provided with a transverse slot, I, below the staking-tool, and in said slot are located the steel. transverse rollers m m, the upper periphm'ies ot whieh are about Hush with the surtaeeot' said slide. \Vhen the stziking-tool deseends, its blade or knife t presses the leather so as to bend it over the rollers downward between their upper portions, and in this manner, as the staking-tool is operated, a rolling pressure is apslotted slide, and. the staking-moi. having verplied on the under or grain side. These rollers are also important in preventing alumtanned or stretehy skins t'roni bagging: up under the knife.

In front of the staking-tool is provided the elearer V, \vhieh eonsists ot a wide blade, 1', having rounded edges and Carried by a foot, I having a stop, s, and. a tension or pressure spring, l. The blade 1- is held lnjtween the taee ol' the foot and the clamp m by the bolts '12, passing" through slots of the blade, which is made adjustable in order that its pressure may be regulated to suit the work. The blade -1 presses on the work just above the outer roller, so that the work is operated between this roller and the blade 1. In this manner a little friction is put on the roller and the deviee serves an important purpose in stretehing or clearing the skin in Front of the staktug-tool.

The table, and with it the long slide, ean be moved by means of the pedal-frame I, which is pivoted to the end portions of the main frame, and is provided with levera irms whieh extend under the supports Z) ol the table-frame ,l

The operation is as follows: The skin of leather being plaeed upon the table between the jaw and holding-bridge is held thereby, while the elearer and staking-tool and the rollers below aet to stret eh and bend the skin in the manner designed. When the holdingjaw is raised during the reverse motion of the long slide, the skin is shifted by the operator to obtain a fresh purehase tor the work over a new portion'thereol', and when the jaw has elosed down the long slide and the carrier ot. the staking-tool and elearer move away from nation, with a longitudinal1y-slotted table and a t 'ansverselyslotted slide reciprocating in the slot of said table, of the rollers in the slot of the slide, a staking-tool, and reciproeating" ineehanism, substantially as specified.

2. In a leather-stakingmaehine, the combination, with the slotted table and ln-idge, of the long slide 'reeiproeating beneath the lirridg'e and a reeip roeati n g st ak i ll l'-l1()( )l, sul )stantially as speeitied.

I}. In a leather-staking maehine, the eombination, with the slotted table and bridge jaw, of the verti(:ally-reeiproeating jaw-slide, the longitudinally 1'eeip'roeating' transverselytieal as well as longitudinal motion oi reciproeation, substantially as speeitied.

it. The combination, with a reciprocating leather-staking tool and a transversely-slotted slide reeiproeating thm-ewith, of the rollers in the slot of said slide and the springaetuated clearer in front of the staking-tool, substantially as speeitied.

5. A maehine tor staking leather having a slotted table and bridgeaw, a transverselyslotted. slide reeiproeati11g in the slot; of the table, rollers in the slot of the slide, and a elearer in front ot the staking-11ml, substantially as speeitied.

U. In a leather-staking' maehine, the eombination, with the notehed pitman, the staking;- tool, and the slide-jaw, ot' the roek-shat't and its crank-arms, the main spring of the pitman, and tho se(.-ondary springeonneeted to one of the arms of the rook-shaft, substantially as specified.

'7. A leather-staking maehine havinga long'itudinally-slotted table having a surface-extension on eaeh side of its slot, a bridge-jaw spanning its slot, a reeiproeating transversely-slotted slide in the slot of the table, and a reeiproeating staking'd'ool', sul)sta'ntially as speei tied.

A leather-stakine' maehine eonsisting of a main frame having a slotted vertieally-reei n'oeating table and a )edal-lrame, a toolea rrior frame having," a vertical reciprocating nieehanism, a transversely-slotted r(, ei]n'oeating slide, a bridge-jaw over said slide, a reeiproeating' staking-tool carrier, an arm eonneetline; said slide and tool-carrier, a slide-jaw op eratine' in eonneetion with said bridg'eflaw, t k I the lmolding-(damp, elearing' the path of thef stz'ikil'ig-knite, and bending the skin in said path between the rollers by the aetion of said .knil'e.

Having deseribed this invention, what I claim, and desire to seeu re by Letters latent, 2

1. In a leather-staking machine, the eombiand o )eratin;;' meehanism, substantially as speei tied.

In testimony 'wlu'a'eot'I al'lix my signature in presenee of two witnesses.

HEORH 1*) \V. BAKER. \Yitnesses:

Y ui'ii'nrrn AN nicest )N, IHARY Bonus.

ITO 

